ABB PM851 AC 800M Series Controller

Product Description

The ABB PM851 is a programmable controller in the AC 800M series, designed to execute control logic and manage communication within industrial automation systems. It combines a 24 MHz processor, 12 MB of memory, Ethernet connectivity, and serial communication interfaces on a single CPU board. Furthermore, its modular architecture supports step-by-step system expansion and configuration through 800xA Control Builder.

Key Features

• CPU Board: Integrates a microprocessor, RAM, real-time clock, LED status indicators, INIT push button, and CompactFlash interface.
• Ethernet Communication: Provides two RJ45 ports, CN1 and CN2, for Control Network connections.
• Serial Communication: Includes two RJ45 serial ports, COM3 and COM4, for communication and configuration purposes.
• Application Memory: Provides 6.253 MB of available application memory within 12 MB of total memory.
• Processing Performance: Executes 1,000 Boolean operations in 0.46 ms.
• System Expansion: Supports modular system configuration and step-by-step expansion.
• Configuration Software: Supports configuration using 800xA Control Builder.

Technical Specifications

Processing and Communication Interfaces

The PM851 executes programmed control logic through its onboard microprocessor and RAM. Its 24 MHz clock frequency and specified Boolean execution performance define its processing characteristics. Meanwhile, the real-time clock supports time-related controller functions, and the LED indicators provide local operating status information.

For network communication, the controller provides two RJ45 Ethernet ports, CN1 and CN2. However, PM851/PM851A restricts redundant Ethernet communication to CN1. This limitation should be considered when checking network architecture and redundancy requirements.

In addition, the two serial interfaces serve different purposes. COM3 provides RS-232C communication with modem control, while electrically isolated COM4 supports connection to a configuration tool.

Configuration and System Expansion

The PM851 supports configuration through 800xA Control Builder. Its modular design allows users to expand the control system incrementally according to application requirements.

Furthermore, the CompactFlash interface provides a dedicated memory interface on the CPU board. The INIT push button and LED indicators also give maintenance personnel access to local controller controls and status information.

Frequently Asked Questions

Q: What is the difference between the PM851 Ethernet ports CN1 and CN2?

A: Both ports provide RJ45 Ethernet connections for the Control Network. However, PM851/PM851A supports redundant Ethernet through CN1 only. Therefore, network configuration should account for this restriction.

Q: What are the functions of COM3 and COM4?

A: COM3 provides an RS-232C serial interface with modem control. COM4 is electrically isolated and intended for configuration tool connections.

Q: Which software supports the ABB PM851?

A: The PM851 supports configuration using 800xA Control Builder. The required software version should be checked against the installed controller configuration.

Other Attributes

• Series: Advant OCS/800xA
• Country of Origin:  Germany/Sweden/Finland
• Lead Time: In Stock, 2 Working Days

In Stock Hot Items of ABB

Our Competitive Brands

• - ABB Advant-800xA，Advant OCS，Bailey Infi 90 and Net 90，H&B Freelance 2000，DSQC Robots，IGCT / IGBT
• - GE General Electric Field Control, Genius I/O, QuickPanel, RX3i PacSystem, Series 90, Series 90, Series VersaMax
• - Allen Bradley Allen-Bradley SLC500, MicroLogix, CompactLogix, ControlLogix, PLC-5, Panel View,
• - Bently Nevada 3300 System, 3500 System
• - Honeywell 7800 Series, FSC, IPC, Mxopen, TDC 2000, TDC 3000, Experion PKS(C200,C300)
• - Yokogawa Centum CS - Centum VP, Centum XL - micro XL, FA-M3, ProSafe-PLC
• - Ovation, Foxboro, EPRO, Emerson DeltaV, Fuji, Siemens, HIMA, Prosoft, Invensys Triconex, ICS TRIPLEX, Woodward, Bachmann, Schneider

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